Just an update: I have been able to solve the random connection drops by using CAT6 cables instead of the included CAT5 cables. The error with trying to update the firmware persists, however.

Hello, I recently purchased a TP-LINK AV1300 (TL-PA8030P V3) kit from Amazon.de. I've noticed that several times throughout the day, my connection will drop or hang for 5-15 seconds before coming...